Punch and die



To @ZZ whom, it may concern:

' that class of punches and dies which are used has been accomplished itthrows out the iin- `die-holder C in the usual manner, and it isprovided with a center piece, D, which'is sup- NITEI) STATES PATENTOEEICE.

WILLIAM K. LEWIS, OF BOSTON, MASSACHUSETTS.

Speelfcaiion forming part of Letters Patent No. 16,6SI dated March 7,1865.

Be it known that I, WILLIAM K. LEwIs, of Boston, in the county ofSuffolk and State of Massachusetts, have invented a new and ImprovedPunch and Die; and I do hereby declare that the following isa full,clear, and eX- act description thereof, which will enable others skilledin the art to make and use the same, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure l is a vertical central section of this invention, the line x x,Fig. 2, indicating the plane of section. Fig. 2 is a plan or top View ofthe same.

Similar letters of reference indicate like parts.

This invention relates to an improvementin for cutting and prickingstuds, caps or covers for tin cases, te., at one operation.

The invention consists in the employment or use of a pointed needlepassing through the center of thedie, which, being made yielding,recedes as the punch advances in such a manner that the stud or cap,after it has been cut out or while being cut out, is brought in Contactwith the central needle, and the operation of pricking and cutting thesame is accomplished at one and the same operation. Said pricking-needleis adjustable by means of a set-screw appliedbelow the die, and it isguided by a hole passing in a longitudinal direction through theyielding center piece of the'die, which is supported by a spring, sothat it recedes as the punch advances, and after the operation ofcutting and pricking ished stud and makes room for a new stud.

vA represents the punch, which is secured in the press by means of itsshank a in the ordinary Inanner. Its cutting-edge is ch amfered off, asclearly shown in Fig. l of the drawings, so that the same cuts the sheetmetal, leaving the burr or roughness, if any, on the inside of thestuds, rendering the same easier to close and with much less solder thanstuds cut out by a punch and die of the ordinary construction. The die Bis secured to the ported by a spring, E. This spring is concealed in acavity, b, in the bed-plate, being supported by a rim, c, as clearlyshown in Fig. l of the drawings, and it bears on a shoulder, d, at theunder side of the center piece. When the center piece is depressed, theshoulder d strikes the projection e of the die-holder, and by these'means its downward motion is confined within certain limits. The shankof the center piece passes through the flanged guide or rim o ofthedie-holder, and it is held in place by twbjam-nuts, which also serve toadjust said center piece at the desired height.

F is the vpricking-needle, which passes through a hole bored in alongitudinal direction through the middle of the yielding center piece.This needle rises from a screw, g, which is tapped into a bridge, h,that is rigidly attached to the under surface of the die-holder O. Byturning this screw the pricking-needle can be adjusted higher or lower,as may be desired. The sheetmetal to be cut is placed between the uppersurface of the yielding center Y and the lower surface of the fork G,which serves to disengage the sheet metal after-it has been cut fromthepunch, and as the punch is depressed the center piece yields and theprickinglneedle pierces the stud or cap, while at the same time, ornearly so, the punch takes action and cuts the same to the requiredsize.l

The operation of cutting out and pricking studs or caps for fruit-canswhich require to hermetically sealed is thereby considerably facilitatedand much time is saved.

I claim as new and desire to secure by Letters Patent" l. Thepricking-needle F, applied in coinbination with the yielding centerpiece, D, die B, and punch A, substantially as and for the purpose setforth.

2. The combination of the center piece, D, and needle F, separablyadjustable in height, and employed in connection with the spring E, inthe manner and for the purposes eX plained. f

WILLIAM K. LEWIS.v

Witnesses:

ELBRIDGE C. COWEY, ROBERT P. LONG.

